The ELODIE survey for northern extra-solar planets IV. HD196885, a close binary star with a 3.7-year planet

A.C.M. Correia , S. Udry , M. Mayor , A. Eggenberger , D. Naef , J.-L. Beuzit , C. Perrier , D. Queloz

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J.-P. Sivan F. Pepe N.C. Santos D. S\'egransan

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classification 🌌 astro-ph

keywords planetconstraintselodieextra-solarorbitalplanetspresencestar

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Aims:We aim to significantly increase the number of detected extra-solar planets in a magnitude-limited sample to improve our knowledge of their orbital element distributions and thus obtain better constraints for planet-formation models. Methods: Radial-velocity data were taken at Haute-Provence Observatory (OHP, France) with the ELODIE echelle spectrograph. Results: We report the presence of a planet orbiting HD 196885 A, with an orbital period of 1349 days. This star was previously suggested to host a 386 -day planet, but we cannot confirm its existence. We also detect the presence of a stellar companion, HD 196885 B, and give some constraints on its orbit.

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The ELODIE survey for northern extra-solar planets IV. HD196885, a close binary star with a 3.7-year planet

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